Influence of CuO Dopants on the Sintering Ability and Phase Stability of Yttria-Stabilized Tetragonal Zirconia Polycrystals

J. Ocean Eng. Technol. 1999;13(2):35-40.

Pee, Jae-Hwan;Kim, Yun-Hae;Motozo Hayakawa;

Y-TZP의 燒結性 및 相安定性에 대한 CuO添加의 影響

피재환;김윤해;

한국해양대학교 기계소재공학과;한국해양대학교 기계소재공학과;日本鳥取大學機械工學科;

Keywords: Y-TZP, DL, TG-DTA, Superplasticity, Phase Stability, 4-Point Bending Test, Sintering Ability

핵심용어: 잇토리아 안정화 정방정 지르코니아 다결정체, 선팽창계, 열중량-시차열분석, 초소성, 상안전성, 4점 굽힘시험, 소결성

Abstract

Effects of CuO addition on the sintering ability and the phase stability of Y-TZP. (Yttria doped Tetragonal Zirconia Polycrystals) were studied. The CuO dopants were found to be quite effective in reducing the sintering temperature to obtain full density and refining the grain size. The maximum allowable concentration of the dopants was limited to 0.3%mol% for CuO to maintain fully tetragonal phase. With the addition of these dopants, the flexual strength decreased by 20% in comparison with the undoped specimen but the fracture toughness increased by 15%.